At present, there are about 250,000 sets local ventilators for coal
mining that are in service in China. And about 110 local ventilator
manufacturing enterprises have acquired MA and KA marks (including about
10 non-coal mine production enterprises), and they are mainly
distributed in Hunan, Shanxi, Chongqing, Shandong and Jiangxi, etc,
total 19 provinces, cities and autonomous regions. In 2013, China's
local ventilator market scale reached CNY 3.576 billion, in which the
coal mining was CNY 3.219 billion and nonferrous metal was CNY 336
million.

From the perspective of the demand in long and middle term, the factors
that influence China's demand of mineral resources basically do not
change, and the contradiction between supply and demand of mineral
resources is sure to exist for a long time. Huidian Research estimated
that the market scale of China's mining ventilator will reach CNY 7.631
billion in 2014, and CNY 12.15 billion in 2018, with an annual growth
rate of 12.3%.